It "would not be fair" for seven-time champion Serena Williams to be seeded for Wimbledon, says world number 32 Dominika Cibulkova.
The 29-year-old will not be seeded if the ex-world number one - currently 183rd in the rankings - is seeded.
Williams, 36, has called for players returning from pregnancy to have protected seedings as well as protected rankings.
But Slovakia's Cibulkova said: "I don't think it's the right thing to do."
She added: "I think it's just not fair. I have tried and I should be seeded. If they put her in front of me then I will lose my spot that I am supposed to have.